Grinding device



March 26, 1968 A. KLEIN 3,374,585

GRINDING DEVICE Filed Feb. 11, 1965 INVENTOR A. Klein OLMJ m A'r-ro RN sas United States Patent GRINDING DEVICE Artur Klein, Austrasse 6a, Netphen,

Kreis Siegen, Germany Filed Feb. 11, 1965, Ser. No. 433,254

Claims priority, application Germany, Feb. 15, 1964, W 36,177/64 4 Claims. (Cl. 51165) ABSTRACT OF THE DISCLGSURE A grinding machine for grinding conical articles is provided with a grinding wheel carrier which is swingable upon an axle parallel to the axis of the workpiece. The rough adjustment is carried out by a shaft while the fine adjustment is carried out by a roller movable relatively to said axle.

This invention relates to a grinding device and refers more particularly to a device used in conjunction with grinding machines for grinding lightly conical articles, such as roller bearings of roll necks and the like.

Devices known in prior art for producing conical surfaces in workpieces by the use of rotary machines, such as lathes and grinding machines, are so constructed that the longitudinal movement of an under carrier slidable upon a lathe bed is attained through change speed gears by a transverse movement of upper support constituting the workpiece carrier. The precision of such devices is insufiicient to produce articles of light conicity.

Roll grinding machines are known wherein a special upper support is made swingable in the direction of the superfices of the cone. Then the axial grinding wheel support carries out its reciprocal movement upon this upper support. A drawback of this construction is that the swingable upper support extends with one of its ends into the space reserved for the workpiece so that special arrangements are necessary to prevent a collision between the supported workpiece and the tailstock or the mandrel stock.

A cambering device is also known which is used at the same time for the setting of the grinding Wheel carrier and which is combined with a roll grinding machine ha ing a grinding wheel carrier mounted upon a side reciprocable parallel to the workpiece carrier, whereby the grinding wheel is swim-gable about an axis extending parallel to the direction of the reciprocating sliding movement. A one-armed switch lever is swingably mounted upon this slide; its free end rests upon a vertically adjustable stop carried by the slide. A pressure piece carrying the grinding Wheel carrier is swingably mounted upon the lever between its free end and its axis of rotation. This construction is usable for the grinding of cones and the like but it is complicated and expensive.

An object of the present invention is to improve and simplify prior art constructions.

Other objects will become apparent in the course of the following specification.

In the accomplishment of the objectives of the present invention it was found desirable to provide a device for grinding lightly conical surfaces which incorporates an under support which can move parallel to the axis of the workpiece, an upper support adjustable relatively to the workpiece and a grinding wheel carrier which is swingable upon an axle extending parallel to the axis of the workpiece and located close to the workpiece in order to adjust the grinding according to shape. In accordance with the present invention this device has a roller mounted upon the lower side of that end of the grinding wheel carrier which faces the operator, whereby the axis of the Patented Mar. 25, 3.968

roller extends parallel to the grinding wheel axis and whereby its distance from the grinding wheel axis is adjustable by suitable setting means. A shaft engaging the roller is provided in the upper support and is adjustable in height, the shaft being actuated by setting means.

Thus in accordance with the present invention this device contains for adjusting purposes only two members directly connected with the upper support and the grinding wheel carrier, respectively, namely, the shaft and the roller, whereby the rough adjustment can be carried out by the shaft and the fine adjustment or subsequent deed by shifting the roller relatively to the swinging axis of the grinding wheel carrier. A reverse arrangement can be also used.

The invention Will appear more clearly from the following detailed description when taken in connection with the accompanying drawing showing by way of example, a preferred embodiment of the inventive idea.

The sole figure of the drawing is a side view, partly in section, of a device of the present invention.

The drawing illustrates a roll grinding machine having a supporting bed 1 and a lower support 2 which is longitudinally movable upon the bed along a prismatic guide 3 and a flat guide 4. An upper support 5 is transversely movable upon the support 2;. The support 5 carries a grinding Wheel carrier 6 which is swingable about an axle 7. A grinding wheel 8 (shown by broken lines in the drawing) has an axle 9 which is located at a distance a above the swinging axle 7; obviously the two axles extend parallel to the axis of a workpiece (not shown). A roller ll is mounted at a lower edge 11 of that end of the grinding wheel carrier 6 which faces the operator. The axis of the roller 16 is located at a distance [7 from the center of the axle 9 of the grinding wheel. The roller 19 can be adjusted by a setting screw 12 in the direction of the double arrow 13;; it can also be adjusted by a setting screw 14 in the direction of the double arrow 15,

The upper support 5 carries a casing 16 which faces the operator. A shaft 17 is movably mounted in the easing 16 in such manner that its axis 13 extends perpendicularly to a plane 19 which passes through the swinging axle 7 and the axis of the roller It in the intermediate po iion of the grindirn wheel carrier 6.

The shaft 17 is moved by an integral rack 20 meshing with a driving pinion 21.

The rough adjustment takes place in the directions of the double arrow 15, whereby the roller 10 is also adjustable by the setting screw 14 to shift the grinding wheel for the purpose of equalizing the wearing off of the grinding surfaces. The adjustment in the direction of the double arrow 13 through the set screw 12 varies the distance b, so that by these means it is possible to provide a fine adjustment in relation to the angle of the cone, thereby overcoming shifts caused by changes in the stages of the drive (not shown). Such shifts cannot be eliminated to provide operation entirely without stages by regularly used means.

The shaft 18 has a front surface 22 which extends parallel to the plane 19 in order that the setting of the angle of the cone in accordance with the double arrow 13 should not result in a change in the distance of the axle 9 of the grinding wheel from the workpiece.

The operation of the device is apparent from the above description.

What is claimed is:

1. A device for grinding conical workpieces, comprising a lower support movable in one direction, an upper support carried by said lower support and movable transversely to said one direction, a grinding wheel carrier, a grinding wheel axle carried by said grinding wheel carrier,

a grinding Wheel upon said grinding wheel axle, and a second axle carried by said upper support and sWin-gably supporting said grinding wheel carrier, said second axle extending parallel to said one direction; a roller carried upon the underside of said grinding wheel carrier said roller extending parallel to the first-mentioned axle, means for adjusting said roller to vary the distance of said roller from the first-mentioned axle, a shaft having an end surface engaging said roller, and means connected with said shaft for moving said shaft in its longitudinal direction.

2. A device in accordance with claim 1, further comprising separate means adjusting said roller in the longitudinal direction of said shaft.

3. A device in accordance with claim 2, wherein said shaft extends perpendicularly to a plane passing through the center of the second-mentioned axle and the axis of said roller.

4. A device in accordance With claim 3, wherein the end surface of the shaft which engages said roller extends parallel to said plane.

References Cited UNITED STATES PATENTS LESTER M. SWINGLE, Primary Examiner. 

